WO2011021452A1 - Barre omnibus - Google Patents

Barre omnibus Download PDF

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Publication number
WO2011021452A1
WO2011021452A1 PCT/JP2010/061881 JP2010061881W WO2011021452A1 WO 2011021452 A1 WO2011021452 A1 WO 2011021452A1 JP 2010061881 W JP2010061881 W JP 2010061881W WO 2011021452 A1 WO2011021452 A1 WO 2011021452A1
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WO
WIPO (PCT)
Prior art keywords
bus bar
battery
welded
electric wire
conductor
Prior art date
Application number
PCT/JP2010/061881
Other languages
English (en)
Japanese (ja)
Inventor
池田　智洋
真一 柳原
井上　秀樹
Original Assignee
矢崎総業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 矢崎総業株式会社 filed Critical 矢崎総業株式会社
Priority to US13/391,151 priority Critical patent/US8574003B2/en
Priority to CN201080043403.4A priority patent/CN102687308B/zh
Priority to EP10809797.3A priority patent/EP2469625B1/fr
Publication of WO2011021452A1 publication Critical patent/WO2011021452A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a bus bar that is used in, for example, a power supply device including a plurality of batteries and connects electrodes of two batteries to each other.
  • a power source for example, see Patent Document 1 configured by connecting a plurality of relatively small batteries in series.
  • FIG. 13 is a top view of a conventional power supply device.
  • the power supply device includes a battery assembly (not shown) and a bus bar module 105 stacked on the battery assembly.
  • the battery assembly includes a plurality of batteries. The plurality of batteries are held in a state of being arranged in one direction so that the positive electrodes and negative electrodes (electrodes) of the batteries adjacent to each other are adjacent to each other.
  • the bus bar module 105 includes a plate 150 and a plurality of bus bars 101.
  • the plate 150 is made of an insulating synthetic resin, and has a planar shape as a whole substantially equal to the upper surface of the battery assembly.
  • the plate 150 includes a plurality of bus bar accommodating portions 152 that accommodate the bus bar 101.
  • Each bus bar accommodating portion 152 includes a bottom wall 152a on which the bus bar 101 is stacked and a hole communicating with a hole 123 described later of the bus bar 101 passes through, and a plurality of peripheral walls 152b erected from the outer edge of the bottom wall 152a. It is formed in the shape of a box that is open.
  • the bus bar 101 is obtained by pressing a conductive metal plate, and is formed in a substantially rectangular plate shape.
  • the bus bar 101 also has a pair of holes 123 through which the adjacent positive and negative electrodes of adjacent batteries pass.
  • the bus bar 101 is attached to the bus bar accommodating portion 152 of the plate 150, and the hole 123 of the bus bar 101 and the hole of the bus bar accommodating portion 152 are communicated. Then, the bus bar module 105 is stacked on the battery assembly through the electrode of the battery in the communicating hole, and a nut is screwed into the electrode. Then, each bus bar 101 connects the electrodes of adjacent batteries, and a plurality of bus bars 101, that is, a bus bar module 105, connects a plurality of batteries in series. Thus, the power supply device is assembled.
  • the battery of the power supply device described above may be connected to an ECU (Electronic Control Unit) as a control unit via an electric wire 106 as a circuit body.
  • ECU Electronic Control Unit
  • the electric wire 106 is a covered electric wire provided with a conductive conductor 161 and an insulating covering portion 162 that covers the conductor 161. At one end of the electric wire 106, the covering portion 162 is peeled off and removed, and the conductor 161 is exposed. One end of the electric wire 106 is connected to the voltage detection terminal 109.
  • the voltage detection terminal 109 is obtained by pressing a conductive metal plate, and integrally includes a battery connection portion 191 connected to the battery electrode (bus bar 101) and a wire connection portion 192 connected to the electric wire 106. ing.
  • the battery connection portion 191 is formed in a substantially square plate shape that is about half the size of the bus bar 101, and one hole 193 through which the positive electrode and the negative electrode of the battery pass is penetrated in the center.
  • the electric wire connecting portion 192 includes a rectangular plate-like bottom plate portion that is continuous with the outer edge of the battery connecting portion 191 and a plurality of crimping pieces that are continuous with both ends of the bottom plate portion in the width direction.
  • the one end of the electric wire 106 described above is connected to the voltage detection terminal 109 by overlapping the exposed conductor 161 on the bottom plate portion of the electric wire connecting portion 192 and caulking the caulking piece.
  • the battery connection portion 191 is overlapped with the bus bar 101 in the bus bar accommodating portion 152 through the battery electrode in the hole 193, and the nut is screwed into the electrode, so that the battery electrode (bus bar 101).
  • a connector is attached to the other end of the electric wire 106 and is connected to the ECU by connector connection.
  • the remaining capacity of each battery is monitored by connecting the ECU and the battery of the power supply device via the electric wire 106 and the voltage detection terminal 109 (and the bus bar 101).
  • the voltage detection terminal 109 is overlaid on the bus bar 101 and connected to the battery electrode (bus bar 101).
  • the electric wire 106 and the battery were connected.
  • the bus bar 101 and the voltage detection terminal 109 are separate parts, there is a problem that the number of parts increases.
  • it is necessary to attach both the bus bar 101 and the voltage detection terminal 109 to the bus bar accommodating portion 152 there are many problems in that the assembling process is complicated and the assembling work takes time.
  • an object of the present invention is to provide a bus bar that can reduce the number of parts and improve the assembly workability.
  • the invention described in claim 1 is a bus bar including a battery connection portion for connecting electrodes of two batteries to each other.
  • This is a bus bar characterized in that it is provided with a circuit body connection portion that is directly connected to the circuit body by overlapping the conductors.
  • the invention described in claim 2 is the bus bar according to claim 1, wherein the circuit body connecting portion includes a welded portion to which the conductor of the circuit body is welded, the welded portion, and the battery connecting portion.
  • the welded portion has a protruding portion that protrudes from the surface of the welded portion and is welded by overlapping the conductor of the circuit body. It is a bus bar characterized by being provided.
  • the battery connection portion has a hole through which the electrode of the battery is passed, and A bus bar comprising a plurality of overlapping flat plate portions and a second connecting portion for connecting the flat plate portions to each other.
  • the circuit body is directly connected to the bus bar, there is no need for a separate terminal connected to the circuit body and connected to the bus bar. Therefore, the number of parts can be reduced. Further, since the terminal is not necessary, the assembly process can be reduced, the assembly work time can be shortened, and the assembly workability can be improved.
  • the cross-sectional area of the connecting portion is smaller than the cross-sectional area of the welded portion, when the bus bar and the circuit body are welded, the heat generated in the welded portion is transmitted to the connecting portion. Difficult to flow out to battery connection. Therefore, the welded portion and the conductor can be efficiently melted, and the bus bar and the circuit body can be reliably welded.
  • the area of the contact portion between the welded portion and the conductor can be reduced by overlapping and welding the conductor of the electric wire on the protruding portion protruding from the surface of the welded portion. For this reason, when resistance welding the bus bar and the circuit body, concentrated resistance is generated at the contact portion and resistance heat generation is likely to occur, and the generated resistance heat generation is less likely to flow out to the connecting portion. Therefore, the welded portion and the conductor can be efficiently melted, and the bus bar and the circuit body can be reliably welded.
  • the plurality of flat plate portions that are overlapped with each other are more easily bent than the flat plate portion of a single plate having a total thickness of the plurality of flat plate portions. For this reason, when there is variation in the height of the electrode of the battery, the plurality of flat plate portions can be bent to absorb the variation in the height of the electrode. Accordingly, the bus bar and the battery electrode can be reliably connected. Further, since the bus bar can be formed by pressing a thinner metal plate, the bus bar can be manufactured with a high yield, and the manufacturing cost can be reduced.
  • FIG. 2 is a side view of the bus bar shown in FIG. 1. It is an expanded view of the bus bar shown by FIG. It is a perspective view which shows the state by which the conductor of the electric wire was piled up on the bus bar shown by FIG. It is a perspective view which shows the state by which the conductor of the electric wire was welded to the bus bar shown by FIG. It is a top view which shows the state by which the bus bar shown by FIG. 1 was attached to the bus bar accommodating part.
  • FIG. 11 is a cross-sectional view illustrating a state where the height of the electrode illustrated in FIG. 10 varies.
  • FIG. 7A is a cross-sectional view taken along line XII-XII in FIG. (B) It is sectional drawing when a pair of flat plate part shown by Fig.12 (a) is made into the flat plate part of a single plate. It is a top view which shows the conventional power supply device.
  • a bus bar 1 shown in FIG. 1 according to an embodiment of the present invention constitutes a power supply device 10 shown in FIG.
  • the power supply device 10 is mounted on an electric vehicle that travels using an electric motor, a hybrid car that travels using both an electric motor and an engine, and supplies power to the electric motor.
  • the power supply device 10 includes a battery assembly 4 and a bus bar module 5 as shown in FIG.
  • the battery assembly 4 includes a plurality of batteries 41, an end plate 45, a fixed band 46, and the like.
  • the battery 41 includes a battery main body 42, a positive electrode 43, and a negative electrode 44.
  • the battery body 42 is formed in a flat box shape.
  • the positive electrode 43 and the negative electrode 44 are formed in a rod shape, and protrude in the same direction from the upper surface of the battery body 42 disposed in the upper part in FIG.
  • the positive electrode 43 and the negative electrode 44 are provided in parallel to each other.
  • the positive electrode 43 and the negative electrode 44 may be collectively referred to as electrodes 43 and 44.
  • the positive electrode 43 and the negative electrode 44 correspond to the electrodes described in the claims.
  • the upper surfaces of the battery bodies 42 are arranged on the same plane, and the positive electrode 43 and the negative electrode 44 of the adjacent batteries 41 are adjacent to each other along one direction H indicated by an arrow H. Are lined up. That is, the batteries 41 are arranged along one direction H, with the positive electrodes 43 and the negative electrodes 44 being alternately stacked in opposite directions.
  • the end plate 45 is made of an insulating synthetic resin and is provided as a pair.
  • the pair of end plates 45 are overlapped with the batteries 41 at both ends among the plurality of batteries 41 arranged along the one direction H as described above, and sandwich the plurality of batteries 41 between each other.
  • the pair of end plates 45 and the plurality of batteries 41 are arranged along one direction H.
  • the fixed band 46 is formed in a band shape and a pair is provided.
  • the pair of fixed bands 46 are arranged along one direction H, and are parallel to each other and spaced from each other.
  • the fixed band 46 is overlapped on the upper surface of the battery body 42 and the upper surface of the end plate 45 of the plurality of batteries 41 whose central portions are arranged along the one direction H, and both end portions through which the bolt holes pass are side surfaces of the end plate 45. It is superimposed on.
  • the both ends of the fixing band 46 are fixed to the end plate 45 by bolts (not shown), and the plurality of batteries 41 and the end plate 45 are integrated and held.
  • the bus bar module 5 is attached to the battery assembly 4 and connects a plurality of batteries 41 in series.
  • the bus bar module 5 includes a plate 50 and a plurality of bus bars 1 (FIG. 1 and the like) attached to the plate 50.
  • the plate 50 is made of an insulating synthetic resin. As shown in FIG. 2, the plate 50 is formed in a rectangular shape whose planar shape as a whole is substantially equal to the upper surface of the battery assembly 4. As shown in FIG. 2, the plate 50 is integrally provided with a thermistor accommodating portion 51, a bus bar accommodating portion 52, a wire routing portion 53, and a welded portion accommodating portion 54 (FIG. 7).
  • a plurality of thermistor accommodating portions 51 are provided.
  • Each thermistor accommodating portion 51 includes a bottom wall through which a hole for passing a thermistor thermometer passes, and a plurality of peripheral walls erected from the outer edge of the bottom wall, and is formed in a box shape opened upward.
  • the peripheral wall is formed with a protrusion that is engaged with the thermistor thermometer and urges the thermistor thermometer so as to always contact the upper surface of the battery body 42.
  • the plurality of thermistor accommodating portions 51 are provided at the center in the width direction of the plate 50 and are arranged along the longitudinal direction of the plate 50.
  • the thermistor accommodating portions 51 are arranged over the entire length of the plate 50 in the longitudinal direction.
  • the thermistor accommodating portion 51 described above accommodates a thermistor thermometer and an electric wire having one end connected to the thermistor thermometer inside.
  • a connector is attached to the other end of the electric wire, and is connected to an ECU (not shown, Electronic Control Unit) as a control unit by connector connection.
  • the ECU is connected to a cooling device that cools the battery assembly 4.
  • the ECU controls the cooling device based on the temperature information of the battery 41 from the thermistor thermometer, and keeps the battery assembly 4 at an appropriate temperature.
  • each bus bar accommodating portion 52 includes a bottom wall 52a on which the bus bar 1 is stacked, and a plurality of peripheral walls 52b erected from the outer edge of the bottom wall 52a, and is formed in a box shape opened upward.
  • the bus bar accommodating part 52 accommodates the bus bar 1 inside.
  • the plurality of bus bar accommodating portions 52 are arranged over the entire length in the longitudinal direction of the plate 50 along the longitudinal direction of the plate 50 (the left-right direction in FIG. 7).
  • the adjacent bus bar accommodating portions 52 are spaced apart from each other, and peripheral walls 52b facing each other are connected by a hinge 52c.
  • Two rows in which the plurality of bus bar accommodating portions 52 are arranged are provided in two rows at intervals from each other along the width direction of the plate 50.
  • Two rows of bus bar accommodating portions 52 are arranged so that the thermistor accommodating portion 51 is positioned between them.
  • a pair of holes 52d communicating with holes 23 described later of the bus bar 1 pass through the bottom wall 52a of each bus bar accommodating portion 52.
  • the communicating hole 52d and the hole 23 of the bus bar 1 allow the adjacent positive electrode 43 and negative electrode 44 of the adjacent batteries 41 to pass inside.
  • a bus bar through hole 52e through which the electric wire connecting portion 3 (described later) of the bus bar 1 passes is formed in the peripheral wall 52b of the bus bar accommodating portion 52 on the side away from the thermistor accommodating portion 51 (upper side in FIG. 7).
  • the bus bar passage hole 52e is provided at the center in the longitudinal direction of the peripheral wall 52b, and is formed by cutting out the peripheral wall 52b from the end of the peripheral wall 52b away from the bottom wall 52a toward the bottom wall 52a.
  • each electric wire routing portion 53 has a rectangular bottom wall 53a on which the electric wires 6 (described later) welded to the respective bus bars 1 are stacked, and a pair erected from both ends in the width direction of the bottom wall 53a.
  • the side wall 53b is formed in a bowl shape opened upward.
  • the plurality of wire routing portions 53 are arranged along the longitudinal direction of the plate 50 over the entire length in the longitudinal direction of the plate 50. Adjacent wire routing sections 53 are spaced apart from each other, and adjacent bottom walls 53a are connected by a hinge 53c.
  • the rows in which the plurality of electric wire routing portions 53 are arranged are arranged at both ends in the width direction of the plate 50, and are provided in two rows along the width direction of the plate 50 at intervals.
  • the rows of the two wire wiring portions 53 are arranged so that the row of the bus bar accommodating portions 52 is positioned between them.
  • Each electric wire routing portion 53 faces each bus bar housing portion 52.
  • a plurality of wires 6 are routed in the wire routing portion 53.
  • each electric wire routing portion 53 includes an electric wire holding piece 53d, an upper wall 53e, a lid portion 53f, and an electric wire through hole 53g.
  • the electric wire holding pieces 53d are formed in a cylindrical shape, and a plurality of pairs are provided so as to protrude from the bottom wall 53a.
  • the electric wire holding pieces 53d position the electric wires 6 between them and hold the electric wires 6 routed in the electric wire routing portion 53.
  • the upper wall 53e extends from the end of the side wall 53b away from the bottom wall 53a so as to face the bottom wall 53a. The upper wall 53e prevents the electric wire 6 from jumping out of the electric wire routing portion 53.
  • the lid portion 53f (FIG. 2) is connected to the side wall 53b via a hinge and covers the opening of the wire routing portion 53.
  • the wire passage hole 53g is provided in the side wall 53b on the bus bar housing portion 52 side, and is provided in a portion facing the bus bar passage hole 52e of the side wall 53b.
  • the wire passage hole 53g is an end portion away from the bottom wall 53a of the side wall 53b.
  • the side wall 53b is cut away from the bottom wall 53a toward the bottom wall 53a.
  • the electric wire passage hole 53 g is guided into the welded portion accommodating portion 54 through the electric wire 6 in the electric wire routing portion 53.
  • the welded portion accommodating portion 54 is provided between the bus bar accommodating portion 52 and the electric wire routing portion 53, and connects the bus bar accommodating portion 52 and the electric wire routing portion 53.
  • the welded portion accommodating portion 54 has a rectangular bottom wall 54a having one end connected to the bottom wall 52a of the bus bar accommodating portion 52 and the other end connected to the bottom wall 53a of the electric wire routing portion 53, and both ends of the bottom wall 54a in the width direction.
  • a pair of side walls 54b provided, and is formed in a bowl shape.
  • the bottom wall 52a has a hole through which an electrode of a resistance welding apparatus described later passes.
  • One end of the side wall 54 b is connected to the edge of the bus bar passage hole 52 e of the bus bar housing portion 52, and the other end is connected to the edge of the wire passage hole 53 g of the wire routing portion 53.
  • the internal space of the welded portion accommodating portion 54 communicates with both the internal space of the bus bar accommodating portion 52 and the internal space of the electric wire routing portion 53.
  • a welded portion 31 (to be described later) of the bus bar 1 and one end of the electric wire 6 are positioned in the welded portion accommodating portion 54, and a welded portion of the bus bar 1 and the electric wire 6 is positioned.
  • the electric wire 6 (corresponding to the circuit body described in the claims) is an electric wire directly connected to the bus bar 1. As illustrated in FIG. 1 and the like, the electric wire 6 is a covered electric wire including a conductive conductor 61 and an insulating covering portion 62 that covers the conductor 61. The electric wire 6 has a round cross section.
  • the conductor 61 is formed by twisting a plurality of strands (not shown).
  • This strand is made of a conductive metal material, and in this embodiment is made of oxygen-free copper (C1020 in JIS H3100).
  • the conductor 61 may be composed of a single strand.
  • the covering portion 62 is made of an insulating synthetic resin. The covering portion 62 is stripped off at one end of the electric wire 6 and the conductor 61 is exposed.
  • the conductor 61 exposed at one end is welded to the bus bar 1. Moreover, a connector is attached to the other end of the electric wire 6 and is connected to the above-described ECU by connector connection.
  • the ECU is connected to the electrodes 43 and 44 of each battery 41 via the electric wire 6 and the bus bar 1. The ECU detects a potential difference (voltage) between the electrodes 43 and 44 of each battery 41 and monitors the remaining capacity and the like of each battery 41.
  • the bus bar 1 is made of a conductive metal material, and is made of oxygen-free copper (C1020 in JIS H3100) in this embodiment.
  • the bus bar 1 is obtained by pressing a metal plate made of oxygen-free copper as described above.
  • the bus bar 1 integrally includes a battery connection portion 2 and a wire connection portion 3 as a circuit body connection portion.
  • the battery connection portion 2 includes a pair of (a plurality of) flat plate portions 21 and a second connection portion 22 that connects the pair of flat plate portions 21 to each other.
  • a pair of flat plate part 21 is formed in the rectangular plate shape which cut off the four corners, and is formed in the substantially identical shape mutually.
  • the pair of flat plate portions 21 overlap each other.
  • the flat plate portion 21 may have three or more flat plate portions 21 overlapping each other.
  • the pair of flat plate portions 21 has a pair of holes 23 through which the electrodes 43 and 44 of the battery 41 are passed.
  • Each hole 23 is formed in a round shape in plan view and penetrates the pair of flat plate portions 21.
  • Each hole 23 is formed such that a hole 23 a penetrating each flat plate portion 21 communicates with the pair of flat plate portions 21 overlapping each other.
  • the pair of holes 23 are provided in the center of the flat plate portion 21 along the longitudinal direction of the flat plate portion 21 and are spaced from each other.
  • the second connecting portion 22 is formed by bending a flat plate into a C-shaped cross section and is provided as a pair.
  • Each of the second connecting portions 22 has a C-shaped end connected to one end in the width direction of one flat plate portion 21, and the other end connected to one end in the width direction of the other flat plate portion 21. They are connected to each other.
  • a pair of 2nd connection part 22 is located in a line with the longitudinal direction of the flat plate part 21, and is spaced apart from each other.
  • the battery connection part 2 having the above-described configuration connects the positive electrode 43 and the negative electrode 44 to each other through the adjacent positive electrode 43 and negative electrode 44 of the battery 41 adjacent to each other in the pair of holes 23 of the flat plate part 21.
  • the plurality of bus bars 1 are positive electrodes 43 (indicated by reference numeral 43a) of a battery 41 (indicated by reference numeral 41a in FIG. 2 and the same hereinafter) located at one end among the plurality of batteries 41 arranged in one direction H. )
  • the negative electrode 44 (indicated by reference numeral 44a) of the battery 41 (indicated by reference numeral 41b) located at the other end, adjacent positive electrodes 43 and negative electrodes 44 are connected, and a plurality of batteries of the battery assembly 4 are connected. 41 are connected in series.
  • the electric wire connection part 3 is continued from the battery connection part 2, and protrudes from the center of the end of the side where the 2nd connection part 22 of one flat plate part 21 continues.
  • the wire connection portion 3 is formed of a single plate and has a thickness equal to the thickness of the single flat plate portion 21.
  • the electric wire connection part 3 is integrally provided with a welded part 31 and a connecting part 32.
  • the welded portion 31 is formed in a rectangular plate shape, and is arranged so that the longitudinal direction is parallel to the longitudinal direction of the flat plate portion 21. On one surface of the welded portion 31, a protruding portion 31 a where the conductor 61 of the electric wire 6 is overlapped and the conductor 61 is welded protrudes.
  • the protrusion 31a is formed in a rectangular shape in plan view.
  • the connecting portions 32 are formed in a plate shape and are provided as a pair.
  • the pair of connecting portions 32 are arranged in parallel with each other at an interval.
  • Each connecting portion 32 is arranged along a direction orthogonal to the longitudinal direction of the flat plate portion 21.
  • Each connecting portion 32 has one end in the longitudinal direction connected to the welded portion 31 and the other end connected to one flat plate portion 21, that is, the battery connecting portion 2, and connects the welded portion 31 and the battery connecting portion 2.
  • One connecting portion 32 is connected to one end in the longitudinal direction of the welded portion 31, and the other connecting portion 32 is connected to the other end in the longitudinal direction of the welded portion 31.
  • a direction C (FIG.) Orthogonal to (crossing) the longitudinal direction of the connecting portion 32 of the pair of connecting portions 32 ie, the direction connecting the welded portion 31 and the battery connecting portion 2). 1 and the cross-sectional area S1 along the arrow C in FIG. 9 is smaller than the cross-sectional area S2 along the orthogonal (crossing) direction C of the welded portion 31.
  • the bus bar 1 and the electric wire 6 are directly connected in the power supply device 10 having the above-described configuration, first, the bus bar 1 is attached to the bus bar accommodating portion 52, the battery connecting portion 2 is positioned in the bus bar accommodating portion 52, and the welded portion 31. Is positioned in the welded part receiving portion 54. Thereafter, the wire 6 is routed in the wire routing portion 53, and the exposed conductor 61 at one end of the wire 6 is overlaid on the projection 31a of the welded portion 31 in the welded portion accommodating portion 54 (FIGS. 5 and 7). .
  • the bus bar 1 and the conductor 61 of the electric wire 6 are resistance welded using a known resistance welding apparatus (not shown).
  • a known resistance welding apparatus (not shown).
  • the welding part 31 in which the conductor 61 is superimposed on the protrusion 31a is positioned.
  • the welding part 31 and the conductor 61 are pinched
  • resistance heat is generated at the contact portion between the protrusion 31a and the conductor 61, the contact portion is melted and joined, and the protrusion 31a and the conductor 61 are resistance-welded (FIGS. 6 and 8).
  • the bus bar 1 and the electric wire 6 are directly connected.
  • the bus bar 1 (and the conductor 61) is made of oxygen-free copper and has a low resistivity (high conductivity), the resistance heat generation described above is difficult to occur and it is difficult to perform resistance welding.
  • the conductor 61 by superimposing the conductor 61 on the protrusion 31a, the area of the contact portion between the welded portion 31 and the conductor 61 is reduced, and concentrated resistance is generated at the contact portion, so that resistance heat is easily generated.
  • the bus bar 1 (and the conductor 61) is made of oxygen-free copper and has high thermal conductivity, resistance heat is easily transmitted from the contact portion through the welded portion 31 and the connecting portion 32 to the battery connecting portion 2 easily.
  • the cross-sectional area S1 of the connecting portion 32 is smaller than the cross-sectional area S2 of the welded portion 31, resistance heat generation is less likely to flow out to the battery connecting portion 2 through the connecting portion 32.
  • the conductor 61 on the protrusion 31a as described above, the area of the contact portion between the welded portion 31 and the conductor 61 is reduced, and resistance heat generation is less likely to flow out to the connecting portion 32.
  • the bus bar module 5 is stacked on the battery assembly 4 through the electrodes 43 and 44 of the battery 41 through the hole 23 of the bus bar 1 and the hole 52d of the bus bar housing portion 52 that are communicated. Thereafter, as shown in FIG. 10, nuts 24 are screwed into the electrodes 43 and 44 to attach the bus bar module 5 to the battery assembly 4. Thus, the power supply device 10 is assembled.
  • the flat plate portion 21 of the bus bar 1 is arranged obliquely with respect to the surface of the battery body 42.
  • the nut 24 is screwed into the electrodes 43 and 44.
  • the contact between the battery connection portion 2 and the electrodes 43 and 44 becomes unstable, or a large stress is applied to the electrodes 43 and 44.
  • the battery connection portion 2 can be more easily bent than when formed by a single flat plate portion 21A having the same thickness. Then, as the pair of flat plate portions 21 are bent, as shown in FIG. 11, the height variation D of the electrodes 43 and 44 can be absorbed.
  • the thickness of each flat plate portion 21 is T
  • the total thickness of the pair of flat plate portions 21 is 2T. Therefore, the easiness of bending is compared between a flat plate portion 21A of a single plate having a thickness of 2T and a pair of flat plate portions 21 in which two flat plate portions 21 having a thickness T are stacked.
  • the cross-sectional second moment the harder the object is bent.
  • the electric wire 6 is directly connected to the bus bar 1
  • a separate component terminal connected to the electric wire 6 and connected to the bus bar 1 is not necessary. Therefore, the number of parts can be reduced. Further, since the terminal is not necessary, the assembly process can be reduced, the assembly work time can be shortened, and the assembly workability can be improved.
  • the cross-sectional area S1 of the connecting portion 32 is smaller than the cross-sectional area S2 of the welded portion 31, when the bus bar 1 and the electric wire 6 are resistance welded, the resistance heat generated in the welded portion 31 is transmitted through the connected portion 32 and the battery. It is difficult to flow out to the connection part 2. Therefore, the welding part 31 and the conductor 61 can be efficiently melted, and the bus bar 1 and the electric wire 6 can be reliably welded.
  • the welding part 31 and the conductor 61 can be efficiently melted, and the bus bar 1 and the electric wire 6 can be reliably welded.
  • the pair of flat plate portions 21 that are overlapped with each other is more easily bent than the single plate flat plate portion 21 ⁇ / b> A having a total thickness of the pair of flat plate portions 21. For this reason, when there is a variation D in the heights of the electrodes 43 and 44 of the battery 41, the pair of flat plate portions 21 are bent to absorb the variation D in the heights of the electrodes 43 and 44. Therefore, the bus bar 1 and the battery 41 can be reliably connected. Further, since the bus bar 1 can be formed by pressing a thinner metal plate, the bus bar 1 can be manufactured with a high yield, and the manufacturing cost can be reduced.
  • the wire connection portion 3 includes the connecting portion 32 and the protrusion 31a and has a complicated shape, the yield may be deteriorated.
  • the bus bar 1 can be formed of a thinner metal plate, the bus bar 1 can be formed with a high yield. Can be manufactured.
  • the bus bar 1 and the conductor 61 of the electric wire 6 are directly connected by resistance welding.
  • the wire connecting portion 3 includes a bottom plate portion that is continuous with the flat plate portion 21 and a plurality of crimping pieces that are continuous with both ends of the bottom plate portion, and the conductor 61 is stacked on the bottom plate portion to crimp the crimping pieces.
  • the bus bar 1 and the conductor 61 may be connected.
  • the bus bar 1 and the conductor 61 may be directly connected by welding other than resistance welding.
  • the electric wire 6 has been described as an example of the circuit body.
  • the circuit body may be an FPC (Flexible Printed Circuit), FFC (Flexible Flat Cable), or the like.
  • the bus bar housing portion 52 and the wire routing portion 53 are integrally formed. However, the bus bar housing portion 52 and the wire routing portion 53 are separated from each other, and the bus bar housing portion 52 is provided in advance. After attaching the bus bar 1 and routing the wire 6 in the wire routing portion 53, attaching the wire routing portion 53 to the bus bar accommodating portion 52 and overlapping the conductor 61 on the protrusion 31 a, the bus bar 1 and the wire 6 are connected. You may weld.
  • the bus bar 1 and the electric wire 6 are welded after the bus bar 1 is attached to the bus bar accommodating portion 52 and the electric wire 6 is routed to the electric wire routing portion 53.
  • the electric wire 6 may be attached to the plate 50.
  • the bus bar 1 and the electric wires 6 are preferably arranged and fixed on a tray-shaped jig, and resistance welding work is performed on the jig.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention porte sur une barre omnibus connectant les unes aux autres les électrodes de deux batteries employées dans un dispositif d'alimentation électrique comportant une pluralité de batteries. Dans un dispositif d'alimentation électrique cible, on réalise une connexion entre une batterie et un fil électrique connecté à un corps de circuit par connexion des électrodes de la batterie avec une borne de détection de tension superposée à la barre omnibus. Dans ce cas, la barre omnibus et la borne de détection de tension sont des composants séparés, augmentant ainsi le nombre de composants et le nombre d'étapes d'assemblage et menant à des problèmes tels qu'un rendement médiocre de l'opération d'assemblage. Une barre omnibus (1) comporte une section de connexion de batterie (2) et une section de connexion de fil électrique (3) servant de section de connexion de corps de circuit. La section de connexion de fil électrique est reliée à la section de connexion de batterie (2) et comporte une section soudée (31) à laquelle le conducteur (61) d'un fil électrique (6) est soudé, et une section de liaison (32) qui relie la section soudée (31) à la section de connexion de batterie (2). La zone en coupe selon la direction (C) orthogonale à la direction de liaison de la section soudée (31) à la section de connexion (32) et la section de connexion de batterie (2) est conçue de façon à être plus petite que la zone transversale selon ladite direction (C) orthogonale à la section soudée (31), permettant ainsi de résoudre le problème décrit ci-dessus.
PCT/JP2010/061881 2009-08-18 2010-07-14 Barre omnibus WO2011021452A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US13/391,151 US8574003B2 (en) 2009-08-18 2010-07-14 Busbar
CN201080043403.4A CN102687308B (zh) 2009-08-18 2010-07-14 汇流条
EP10809797.3A EP2469625B1 (fr) 2009-08-18 2010-07-14 Barre omnibus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-188833 2009-08-18
JP2009188833A JP5634691B2 (ja) 2009-08-18 2009-08-18 バスバ

Publications (1)

Publication Number Publication Date
WO2011021452A1 true WO2011021452A1 (fr) 2011-02-24

Family

ID=43606907

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/061881 WO2011021452A1 (fr) 2009-08-18 2010-07-14 Barre omnibus

Country Status (5)

Country Link
US (1) US8574003B2 (fr)
EP (1) EP2469625B1 (fr)
JP (1) JP5634691B2 (fr)
CN (1) CN102687308B (fr)
WO (1) WO2011021452A1 (fr)

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Publication number Priority date Publication date Assignee Title
WO2012163642A3 (fr) * 2011-05-27 2013-04-11 Elringklinger Ag Connecteur de cellule
CN103563128A (zh) * 2011-05-27 2014-02-05 爱尔铃克铃尔股份公司 电池连接件
CN102856524A (zh) * 2011-06-30 2013-01-02 爱尔铃克铃尔股份公司 电池连接器
EP2541648A1 (fr) * 2011-06-30 2013-01-02 ElringKlinger AG Connecteur de cellules
US9276248B2 (en) 2011-06-30 2016-03-01 Elringklinger Ag Cell connector
CN103840228A (zh) * 2012-11-27 2014-06-04 三星Sdi株式会社 电池组
CN103840228B (zh) * 2012-11-27 2018-01-23 三星Sdi株式会社 电池组
EP2846376A1 (fr) * 2013-09-06 2015-03-11 Robert Bosch Gmbh Connecteur de cellules souple et procédé d'un connecteur de cellules souple destiné à la connexion électrique de cellules d'un système de stockage d'énergie
US9905833B2 (en) 2014-08-27 2018-02-27 Gs Yuasa International Ltd. Energy storage apparatus

Also Published As

Publication number Publication date
EP2469625A1 (fr) 2012-06-27
JP5634691B2 (ja) 2014-12-03
US20120208410A1 (en) 2012-08-16
EP2469625B1 (fr) 2018-09-26
EP2469625A4 (fr) 2015-11-04
CN102687308B (zh) 2014-12-10
CN102687308A (zh) 2012-09-19
JP2011040332A (ja) 2011-02-24
US8574003B2 (en) 2013-11-05

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